P-38 Can Opener

The P-38, also known as a 'John Wayne' by the United States Marine Corps, was developed in 1942. It is a small can opener issued in the canned field rations of the United States Armed Forces from World War II to the 1980s. The P38 is pocket-sized, approximately 1.5 inches (38 mm) long, and consists of a short metal blade that serves as a handle, with a small, hinged metal tooth that folds out to pierce the can lid.